i don't know the quality of the one i got [more than likely imported], but it weighs a ton, and the movement is very smooth. i have to get it mounted first before i try it, and i'm not sure when that will happen. i'm in the process now of getting "stuff" rearranged ["garage aerobics" ] for new garage doors. i plan on mounting this on a piece of 5/8" plate that will have a 1 3/4", 1/4"wall square tube that will fit in the quick change pocket i built into the top of my heavy duty, moveable, work table. i mount quite a few tools to the table using this mount, including a vice, grinder, small tube bender, small solid round stock bender, etc. one of the best things to incorporate in a work table i have ever done ! holds tools very secure, and has access almost 360 degrees.